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<?php declare(strict_types=1); |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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namespace Cycle\ORM\Relation\Pivoted; |
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use Cycle\ORM\Exception\ORMException; |
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use Cycle\ORM\Heap\Node; |
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use Cycle\ORM\Iterator; |
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use Cycle\ORM\ORMInterface; |
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use Cycle\ORM\Parser\RootNode; |
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use Cycle\ORM\Promise\PromiseInterface; |
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use Cycle\ORM\Relation; |
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use Cycle\ORM\Select; |
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use Cycle\ORM\Select\JoinableLoader; |
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use Cycle\ORM\Select\Loader\ManyToManyLoader; |
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/** |
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* Promise use loader to configure query and it's scope. |
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*/ |
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class PivotedPromise implements PromiseInterface |
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{ |
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/** @var ORMInterface */ |
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private $orm; |
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/** @var string */ |
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private $target; |
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/** @var array */ |
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private $relationSchema = []; |
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/** @var mixed */ |
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private $innerKey; |
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/** @var null|PivotedStorage */ |
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private $resolved; |
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/** |
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* @param ORMInterface $orm |
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* @param string $target |
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* @param array $relationSchema |
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* @param mixed $innerKey |
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*/ |
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public function __construct(ORMInterface $orm, string $target, array $relationSchema, $innerKey) |
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{ |
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$this->orm = $orm; |
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$this->target = $target; |
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$this->relationSchema = $relationSchema; |
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$this->innerKey = $innerKey; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function __loaded(): bool |
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{ |
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return empty($this->orm); |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function __role(): string |
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{ |
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return $this->target; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function __scope(): array |
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{ |
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return [ |
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$this->relationSchema[Relation::INNER_KEY] => $this->innerKey |
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]; |
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} |
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/** |
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* @return PivotedStorage |
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*/ |
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public function __resolve() |
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{ |
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if (is_null($this->orm)) { |
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return $this->resolved; |
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} |
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if (!$this->orm instanceof Select\SourceProviderInterface) { |
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throw new ORMException("PivotedPromise require ORM to implement SourceFactoryInterface"); |
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} |
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$table = $this->orm->getSource($this->target)->getTable(); |
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// getting scoped query |
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$root = new Select\RootLoader($this->orm, $this->target); |
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$query = $root->buildQuery(); |
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// responsible for all the scoping |
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$loader = new ManyToManyLoader($this->orm, $table, $this->target, $this->relationSchema); |
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/** @var ManyToManyLoader $loader */ |
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$loader = $loader->withContext($loader, [ |
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'constrain' => $this->orm->getSource($this->target)->getConstrain(), |
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'as' => $table, |
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'method' => JoinableLoader::POSTLOAD |
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]); |
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$query = $loader->configureQuery($query, [$this->innerKey]); |
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// we are going to add pivot node into virtual root node to aggregate the results |
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$root = new RootNode([$this->relationSchema[Relation::INNER_KEY]], $this->relationSchema[Relation::INNER_KEY]); |
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$node = $loader->createNode(); |
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$root->linkNode('output', $node); |
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// emulate presence of parent entity |
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$root->parseRow(0, [$this->innerKey]); |
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$iterator = $query->getIterator(); |
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foreach ($iterator as $row) { |
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$node->parseRow(0, $row); |
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} |
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$iterator->close(); |
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$elements = []; |
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$pivotData = new \SplObjectStorage(); |
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foreach (new Iterator($this->orm, $this->target, $root->getResult()[0]['output']) as $pivot => $entity) { |
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$pivotData[$entity] = $this->orm->make( |
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$this->relationSchema[Relation::THOUGH_ENTITY], |
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$pivot, |
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Node::MANAGED |
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); |
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$elements[] = $entity; |
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} |
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$this->resolved = new PivotedStorage($elements, $pivotData); |
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$this->orm = null; |
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return $this->resolved; |
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} |
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} |
cycle /
orm
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